2. Any vitamin preparation in relation to which there are written particulars or directions as to dosage specifying a recommended daily dosage for adults which involves a daily intake in excess of—
(i)the equivalent of 2,500 Units (within the meaning of the 1968 edition of the British Pharmacopoeia) of vitamin A activity, or
(ii)the equivalent of 250 Units (within the meaning of the 1968 edition of the British Pharmacopoeia) of antirachitic activity, or
(iii)25 micrograms of folic acid, or
(iv)5 micrograms of cyanocobalamin.